content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ------------------------------
   * MultiValueCategoryDataset.java
   * ------------------------------
   * (C) Copyright 2007, 2008, by David Forslund and Contributors.
   *
   * Original Author:  David Forslund;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * Changes
   * -------
   * 08-Oct-2007 : Version 1, see patch 1780779 (DG);
   *
   */
  
  package org.jfree.data.statistics;
  
  import java.util.List;
  
  import org.jfree.data.category.CategoryDataset;
  
  /**
   * A category dataset that defines multiple values for each item.
   *
   * @since 1.0.7
   */
  public interface MultiValueCategoryDataset extends CategoryDataset {
  
      /**
       * Returns a list (possibly empty) of the values for the specified item.
       * The returned list should be unmodifiable.
       *
       * @param row  the row index (zero-based).
       * @param column   the column index (zero-based).
       *
       * @return The list of values.
       */
      public List<Number> getValues(int row, int column);
  
      /**
       * Returns a list (possibly empty) of the values for the specified item.
       * The returned list should be unmodifiable.
       *
       * @param rowKey  the row key (<code>null</code> not permitted).
       * @param columnKey  the column key (<code>null</code> not permitted).
       *
       * @return The list of values.
       */
      public List<Number> getValues(Comparable rowKey, Comparable columnKey);
  
  }